SEO keywords MCP and REST API your AI agent can call directly. Search volume, CPC, competition, and ideas.

Ask your AI agent for keyword volume, or call /v1/keywords directly. Cite42 returns monthly search volume, CPC, competition, and related ideas as clean JSON from the same key and credit balance as your AI-search calls.

  • $1 free on signup
  • Credits never expire
  • No subscription
  • MCP native
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Step 1: Create your account

Get $1 in test credit to try your first calls.

Create free account

Step 2: Connect Cite42 MCP

Replace cite42_live_... with your key, then run this once.

Step 3: Ask inClaude Code

You ask your AIFind keyword opportunities for "AI visibility API" and related agent-data terms.
MCP runs/v1/keywords
Runs across the sources shown.
Your AI saysThe strongest cluster is AI visibility API, AI search monitoring API, and AEO reporting tool. Comparison terms are smaller but higher-intent...
ENDPOINT PROMPTS

Ask for SEO Keywords data.

Cite42 calls /v1/keywords and returns structured data your AI can summarize.

  • How much volume does this keyword get?

    You ask your AI“How much volume does this keyword get?”
    MCP runs/v1/keywords
    Google data
    Your AI says“AI blog tool” gets about 4,400 searches a month. It is large enough to target, but not so broad that it needs a huge site. It includes the key result, source context, and next step...

  • What’s the CPC and competition on it?

    You ask your AI“What’s the CPC and competition on it?”
    MCP runs/v1/keywords
    Google data
    Your AI saysCPC is about $3.12 and competition is moderate. That suggests commercial intent without being impossibly crowded. It includes the key result, source context, and next step...
KEYWORD DEMAND

Pull search demand inside your agent.

Use keyword demand data to give your AI volume, CPC, competition, and related terms without opening a separate SEO suite.

  • Validate ideas before writing briefs.
  • Filter topics by demand and difficulty.
  • Combine SEO demand with AI visibility data.
WHAT WE QUERY

Sources Cite42 checks.

Cite42 queries AI answers, search demand, and conversation signals, then returns normalized results your app or agent can use.

  • ChatGPT

    OpenAI · Search when needed

  • Claude

    Anthropic · Search when needed

  • Perplexity

    Perplexity Sonar · Web-grounded

  • Gemini

    Google · Google Search grounding

  • Google AI Overviews

    Google Search · Live SERP

  • Google data

    Google data

    Search demand signal

  • Reddit

    Conversation signal

  • YouTube

    Video demand signal

EXAMPLE USE CASES

Three ways to use this endpoint.

A few practical ways teams use SEO Keywords.

  • Briefs

    Choose topics with demand.

    Let an agent pull volume, CPC, competition, and related terms before drafting a content brief.
  • Programmatic SEO

    Filter large keyword sets.

    Score many candidate pages and keep only the terms with enough demand, fit, and commercial value to generate.
  • Enrichment

    Add metrics to workflows.

    Attach volume, CPC, and competition to AI visibility, content planning, or trend checks before the final recommendation.
PRICING

Pay per call for this endpoint.

Top up once ($25 minimum). Credits never expire, and this endpoint only charges when it runs.

EndpointPriceWhat you get
POST/v1/keywords$0.19Search volume, CPC, competition + related keyword ideas for a seed
See all endpoints and the source coverage table
KEEP EXPLORING

All endpoints

Same API key, same credit balance, different question.

QUESTIONS

Questions about SEO Keywords.

It returns keyword metrics such as search volume, CPC, competition, intent, and optional related keyword ideas for a seed term or prompt.
The endpoint uses DataForSEO-backed keyword data. Cite42 wraps it in a simpler synchronous response and bills it from the same prepaid balance.
Yes. You can pass a natural prompt such as "keywords for AI citation tracking", and Cite42 extracts the seed term before fetching metrics.
Yes. Set "ideas" when you want related keyword ideas, not just metrics for the main seed term.
No. /v1/keywords is a market-data endpoint. Pair it with /v1/rankings or /v1/search when you want AI visibility for those terms.
Use it before writing briefs, landing pages, or comparison content so your AI knows which terms have demand and which are expensive to compete on.
READY WHEN YOU ARE

Give your AI real keyword demand.

Pull search volume, CPC, and related ideas before it writes briefs or picks topics.

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